I call it an ice box sometimes, too.
I had an older boss once who didn’t know what a cistern was. Bless his heart, he was from Detroit or somewhere. I was talking about water in the cistern and he kept asking me what the sister had to do with the water. Sister? Say what?!? No, a cistern!
My next boss was middle eastern who hated women (the feeling was mutual). Someone had given me some watermelons so I tried to give him one as a peace offering. He jumped back like it was a snake and started hollering at me to get away from him. That was a pre-lesson to 9/11.
I worked on an oil rig down south one summer with a crew from Louisiana. They were all excited because the cook was going to serve black eyed peas. Growing up in Minnesota, I made the mistake of saying something like I had never heard of them. They explained, and then went down a list of food wondering if I knew what it was. Okra (yes), collard greens (no), grits (yes), and then it got silly (watermelon, corn, baked beans, etc.)
Oh - I made another mistake at dinner. “Peas - these aren’t peas, they’re JUST beans!”